Red Sox general manager Theo Epstein announced Saturday that outfield prospect Ryan Westmoreland has a “cavernous malformation” in his brain and will require surgery to fix it.

From the description of a brain malformation on the Providence Journal’s website, it sounds like he should be able to make a full recovery. Still, any time you combine the words “brain” and “surgery” there is obvious reason for concern. Westmoreland, 19, is an immensely talented prospect, and hit .296/401/.484 with seven homers, 35 RBI and 19 stolen bases in 223 at-bats last season for Single-A Lowell.

Buchholz, 33, was acquired by the Phillies from the Red Sox in December 2016, but he made only two starts before an MRI revealed he had a partial tear of his right flexor pronator mass. He underwent surgery in April and missed the rest of the season.